International News Service v. Associated Press, 248 U.S. 215 (1918), also known as INS v. AP or simply the INS case, is a 1918 decision of the United States Supreme Court that enunciated the misappropriation doctrine of federal intellectual property common law: a "quasi-property right" may be created against others by one's investment of effort and money in an intangible thing, such as information or a design. The doctrine is highly controversial and criticized by many legal scholars, but it has its supporters.

Sears, Roebuck & Co. v. Stiffel Co., 376 U.S. 225 (1964), was a United States Supreme Court case that limited state law on unfair competition when it prevents the copying of an item that is not covered by a patent.